219 
white with rufous spiral lines in the middle of each 
whorl; whorls six or seven, nearly even, strongly 
striated transversely at the base, finely and closely ribbed 
longitudinally and obsoletely striated in the interstices 
spirally ; apex sharp ; aperture narrow and oval ; outer 
lip thickened with a broad external rib and denticulated 
within, at its base near the end is a small rufous spot 
and another at the upper angle of the aperture, from 
these two obsolete broken lines gird the base of the 
shell. ¢ Weymouth, very rare. 
B. Tusercutatum. Turt. D. p. 16.—Nassa T. 
F. p. 341.—Taper, white, but not glossy; whorls six, 
rounded and well defined, sculptured by numerous 
strong longitudinal ribs which are crossed by transverse 
lines, thus seeming tuberculated; aperture oval, the 
outer lip thin and toothed within ; the inner lipstrongly 
marked with oblique striz and ending in a short, re- 
flected, rather cloven canal. 0,60...0,16. In sand, 
Eumouth, 
Tripe.—COLUMELLARIA. 
No canal at the base of the aperture, but a subdorsal 
PALIPAARAAIAAIO 
* Whether to consider the Voluta Hyalina of Mon- 
tague as a Mitra or as a Buccinum I know not, having 
